The word(s) "disbelieve" appears 269 time(s) in 248 verse(s) in Quran in Muhammad Habib Shakir translation.

(21) Surely the (true) religion with Allah is Islam, and those to whom the Book had been given did not show opposition but after knowledge had come to them, out of envy among themselves; and whoever disbelieves in the communications of Allah then surely Allah is quick in reckoning.

(22) Surely (as for) those who disbelieve in the communications of Allah and slay the prophets unjustly and slay those among men who enjoin justice, announce to them a painful chastisement.

(23) And when Allah said: O Isa, I am going to terminate the period of your stay (on earth) and cause you to ascend unto Me and purify you of those who disbelieve and make those who follow you above those who disbelieve to the day of resurrection; then to Me shall be your return, so l will decide between you concerning that in which you differed.

(24) Then as to those who disbelieve, I will chastise them with severe chastisement in this world and the hereafter, and they shall have no helpers.

(25) O followers of the Book! Why do you disbelieve in the communications of Allah while you witness (them)?

(26) And a party of the followers of the Book say: Avow belief in that which has been revealed to those who believe, in the first part of the day, and disbelieve at the end of it, perhaps they go back on their religion.

(27) How shall Allah guide a people who disbelieved after their believing and (after) they had borne witness that the Apostle was true and clear arguments had come to them; and Allah does not guide the unjust people.

(28) Surely, those who disbelieve after their believing, then increase in unbelief, their repentance shall not be accepted, and these are they that go astray.

(29) Surely, those who disbelieve and die while they are unbelievers, the earth full of gold shall not be accepted from one of them, though he should offer to ransom himself with it, these it is who shall have a painful chastisement, and they shall have no helpers.

(30) In it are clear signs, the standing place of Ibrahim, and whoever enters it shall be secure, and pilgrimage to the House is incumbent upon men for the sake of Allah, (upon) every one who is able to undertake the journey to it; and whoever disbelieves, then surely Allah is Self-sufficient, above any need of the worlds.